A ferritin test is a popular test to measure a person's current iron stores. In women, ferritin is approximately normally distributed with a mean of 89 ng/mL and a standard deviation of 23 ng/mL. What is the probability that a woman has a ferritin value of 100 or less? If a woman has a ferritin of 140, what percentile is this? If 50 women are tested, what is the probability that the mean ferritin exceeds 90?

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A ferritin test is a popular test to measure a person's current iron stores. In women, ferritin is
approximately normally distributed with a mean of 89 ng/mL and a standard deviation of 23
ng/mL. What is the probability that a woman has a ferritin value of 100 or less? If a woman has
a ferritin of 140, what percentile is this? If 50 women are tested, what is the probability that
the mean ferritin exceeds 90?
Transcribed Image Text:A ferritin test is a popular test to measure a person's current iron stores. In women, ferritin is approximately normally distributed with a mean of 89 ng/mL and a standard deviation of 23 ng/mL. What is the probability that a woman has a ferritin value of 100 or less? If a woman has a ferritin of 140, what percentile is this? If 50 women are tested, what is the probability that the mean ferritin exceeds 90?
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